Floating cover biogas digester
- High gas production rate: The structure of the corn flake floating cover biogas tank can better maintain the temperature in the tank stable, create a suitable environment for microbial fermentation, and during the fermentation process of corn flakes, the floating cover can automatically rise and fall with the biogas production, so that the pressure in the tank is relatively stable, which is conducive to improving the gas production rate.
- Easy to observe and manage: The rise and fall of the floating cover intuitively reflects the gas production in the biogas tank. Users can understand the gas production status at any time, which is convenient for reasonable arrangement of gas use. At the same time, the design of the corn flake floating cover biogas tank makes feeding, discharging and stirring operations relatively convenient, and easy for daily management and maintenance.
- Good safety: There is a sealing device between the floating cover and the main body of the biogas tank, which can effectively prevent biogas leakage. Moreover, the floating cover can buffer the pressure changes in the biogas tank to a certain extent, reducing the risk of safety accidents such as explosions caused by excessive pressure.
- Long service life: The floating cover is generally made of corrosion-resistant and aging-resistant materials, such as fiberglass, plastic, etc., which can effectively resist the corrosion of biogas and fermentation liquid, and at the same time reduce the degree to which the tank body is affected by the external environment, thereby extending the overall service life of the biogas tank.
- Strong adaptability: Whether in the cold northern regions or the hot southern regions, corn flake floating cover biogas digesters can adapt to different climatic conditions through appropriate heat preservation or cooling measures. For the fermentation process with corn flakes as the main raw material, it can also be flexibly adjusted according to the raw material characteristics and fermentation requirements.
Corn flake floating cover biogas digester structure
- Fermentation tank: usually cylindrical, made of concrete, plastic or fiberglass, used to hold fermentation raw materials such as corn flakes and provide a place for biogas fermentation.
- Floating cover: generally made of steel, thin-shell cement components or plastic, floating on the surface of the fermentation liquid or in the water jacket, used to collect and store biogas, and generate a certain pressure in the gas chamber through its own gravity.
- Corn flake floating cover biogas digester inlet and outlet system: the feed pipe feeds from the bottom of the fermentation tank, which is convenient for corn flakes and other raw materials to enter; the outlet can be set at the bottom or side to discharge the fermented biogas residue and liquid.
- Water seal tank: cooperates with the floating cover to play a sealing role to prevent biogas leakage and buffer the pressure changes in the biogas tank.
Working principle of corn flake floating cover biogas digester
Corn flakes and other raw materials in the fermentation tank ferment under the action of microorganisms to produce biogas, which enters the floating cover and causes the floating cover to rise. As the biogas production increases, the pressure inside the floating cover increases. When the gas is used, the biogas is discharged under the pressure of the floating cover for users to use, and the floating cover falls. The storage and supply of biogas is achieved by raising and lowering the floating cover.
Corn flake floating cover biogas digester performance parameters
- Gas production rate: Under suitable conditions, with corn flakes as raw materials, the gas production rate can reach about 0.3-0.5 cubic meters/cubic meters per day.
- Fermentation temperature: Medium temperature fermentation is generally controlled at 30-35℃, high temperature fermentation at 50-55℃, and room temperature fermentation is affected by the external environment temperature.
- pH value: The pH value of the fermentation liquid is usually controlled between 6.5-7.5.
Corn flake floating cover biogas digester raw material requirements
- Corn flakes: It is the main raw material and needs to be crushed and pre-treated to increase the contact area with microorganisms.
- Inoculum: Activated sludge at the bottom of the biogas digester, livestock manure, etc. can be used to speed up the fermentation start-up speed.
- Other raw materials: It can be combined with human and animal manure, straw, etc. to adjust the carbon-nitrogen ratio.
Corn flake floating cover biogas digester supporting equipment
- Desulfurizer: removes harmful gases such as hydrogen sulfide in biogas.
- Pressure gauge: monitors pressure changes in the biogas digester.
- Biogas stoves and lamps: used for cooking, lighting, etc.
Installation and maintenance of corn flake floating cover biogas digester
- Installation: Choose a place with high terrain, dryness, flatness and away from fire sources and buildings to build the digester, and construct it according to the design requirements to ensure the sealing and structural stability of the digester.
- Maintenance: Regularly check the sealing and pipeline connection, observe the pressure gauge value, replenish raw materials in time, and regularly clean the digestate and liquid at the discharge port to ensure the normal operation of the digester.
